Tendon stress in continuous unbonded prestressed concrete members - Part 2: Parametric study
Tendon stress in continuous unbonded prestressed concrete members - Part 2: Parametric study
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DOI：
10.15554/pcij.01011999.60.73
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发表时间：
1999-01-01
期刊：
影响因子：
1.1
通讯作者：
Soudki, KA
中科院分区：
文献类型：
--
作者：
Allouche, EN;Campbell, TI;Soudki, KA
本文描述了一种非线性数值模型，能够预测无粘结、部分预应力、连续混凝土梁失效时的响应，并对该模型的结果与测试数据进行了比较。通过参数研究表明，加载模式、加载类型和混凝土约束程度对最终的腱应力有显着影响。最后，建议对现行 A23.3-34 加拿大规范方程进行修改，用于预测预应力无粘结筋混凝土构件的极限筋应力，以便考虑在特定荷载模式下可能产生的所有塑性铰的贡献。修正后的方程的预测结果与可用的测试数据非常吻合。
This paper describes a nonlinear numerical model capable of predicting the response up to failure of unbonded, partially prestressed, continuous, concrete beams, and presents a comparison of results from the model against test data. Loading pattern, type of loading and degree of concrete confinement are shown by means of a parametric study to have a significant effect on the tendon stress at ultimate. Finally, modifications are suggested to the current A23.3-34 Canadian Code equation for predicting the tendon stress at ultimate in concrete members prestressed with unbonded tendons, in order to consider the contribution from all plastic hinges likely to develop under a particular pattern of loading. Predictions from the modified equation are shown to be in good agreement with available test data.